085
FNCA52 TJSJ 181930
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST FRI SEP 18 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-190800-
SOUTHEAST COASTAL PLAINS-
330 PM AST FRI SEP 18 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 50 10
TEMP (24H TREND) 75 (-3) 91 (+1) 75 91
RH % (24H TREND) 87 (-4) 59 (+3) 93 58
WIND 20FT/EARLY(MPH) E 10 E 12 E 11 E 12
WIND 20FT/LATE(MPH) NE 9 SE 14 NE 8 SE 13
MIXING HGT(FT-AGL/MSL) 4790 4710
TRANSPORT WND (MPH) E 12 SE 12
VENT RATE (KT-FT) 47900 47100
DISPERSION 5 5
DSI 3 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ015-190800-
SOUTHERN HILLS-
330 PM AST FRI SEP 18 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 20 10
TEMP (24H TREND) 72 (-3) 89 (+3) 71 89
RH % (24H TREND) 94 (0) 63 (0) 98 63
WIND 20FT/EARLY(MPH) E 10 E 10 E 9 E 9
WIND 20FT/LATE(MPH) E 9 SE 11 E 8 SE 10
MIXING HGT(FT-AGL/MSL) 5530 5340
TRANSPORT WND (MPH) E 9 SE 9
VENT RATE (KT-FT) 44240 42720
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ016-190800-
NORTH COASTAL PLAINS-
330 PM AST FRI SEP 18 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 30 40 20 50
TEMP (24H TREND) 75 (-3) 92 (+2) 74 92
RH % (24H TREND) 95 (0) 62 (-2) 99 61
WIND 20FT/EARLY(MPH) E 14 E 11 E 12 E 10
WIND 20FT/LATE(MPH) SE 9 E 16 SE 9 E 16
MIXING HGT(FT-AGL/MSL) 4860 5100
TRANSPORT WND (MPH) E 10 E 9
VENT RATE (KT-FT) 43740 40800
DISPERSION 5 5
DSI 4 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ017-190800-
NORTHERN HILLS-
330 PM AST FRI SEP 18 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 20 50 30 60
TEMP (24H TREND) 72 (-3) 91 (+1) 72 91
RH % (24H TREND) 96 (-2) 63 (+3) 100 63
WIND 20FT/EARLY(MPH) E 12 E 10 E 10 E 9
WIND 20FT/LATE(MPH) SE 6 E 13 SE 6 NE 12
MIXING HGT(FT-AGL/MSL) 5470 5720
TRANSPORT WND (MPH) E 7 SE 7
VENT RATE (KT-FT) 32820 34320
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ018-190800-
WEST COAST-
330 PM AST FRI SEP 18 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER MCLEAR PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 30 60 50 20
TEMP (24H TREND) 73 (-3) 94 (+3) 74 92
RH % (24H TREND) 96 (+1) 61 (-1) 99 61
WIND 20FT/EARLY(MPH) E 11 E 10 E 10 E 10
WIND 20FT/LATE(MPH) E 9 SE 10 E 10 SE 11
MIXING HGT(FT-AGL/MSL) 4770 4830
TRANSPORT WND (MPH) E 7 E 8
VENT RATE (KT-FT) 28620 33810
DISPERSION 5 5
DSI 3 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ019-190800-
EASTERN INTERIOR-
330 PM AST FRI SEP 18 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 40 30
TEMP (24H TREND) 73 (-4) 90 (+2) 72 90
RH % (24H TREND) 95 (0) 61 (-1) 98 59
WIND 20FT/EARLY(MPH) E 10 E 9 E 9 E 9
WIND 20FT/LATE(MPH) E 10 E 12 SE 9 SE 11
MIXING HGT(FT-AGL/MSL) 6630 6120
TRANSPORT WND (MPH) E 9 SE 9
VENT RATE (KT-FT) 53040 48960
DISPERSION 5 5
DSI 3 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ022-190800-
LUQUILLO MOUNTAIN RANGE-
330 PM AST FRI SEP 18 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 60 40 40 50
TEMP (24H TREND) 71 (-4) 86 (+4) 70 87
RH % (24H TREND) 97 (0) 65 (-7) 100 64
WIND 20FT/EARLY(MPH) E 8 E 8 E 6 E 9
WIND 20FT/LATE(MPH) E 8 E 10 E 6 SE 9
MIXING HGT(FT-AGL/MSL) 4420 4520
TRANSPORT WND (MPH) E 10 SE 12
VENT RATE (KT-FT) 39780 45200
DISPERSION 5 5
DSI 4 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ023-190800-
CENTRAL MOUNTAIN RANGE-
330 PM AST FRI SEP 18 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER MCLEAR PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 30 70 40 40
TEMP (24H TREND) 69 (-4) 88 (+4) 69 87
RH % (24H TREND) 96 (0) 65 (-1) 99 66
WIND 20FT/EARLY(MPH) E 9 E 6 E 8 E 6
WIND 20FT/LATE(MPH) E 5 SE 6 E 6 E 8
MIXING HGT(FT-AGL/MSL) 6190 6040
TRANSPORT WND (MPH) E 6 SE 7
VENT RATE (KT-FT) 30950 36240
DISPERSION 5 5
DSI 1 6 1 5
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ024-190800-
CAYEY MOUNTAIN RANGE-
330 PM AST FRI SEP 18 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 20 40 30
TEMP (24H TREND) 72 (-2) 86 (+3) 71 85
RH % (24H TREND) 97 (-1) 67 (-2) 99 66
WIND 20FT/EARLY(MPH) E 8 E 9 E 8 E 8
WIND 20FT/LATE(MPH) E 8 E 10 E 6 SE 9
MIXING HGT(FT-AGL/MSL) 5250 5030
TRANSPORT WND (MPH) E 10 SE 9
VENT RATE (KT-FT) 47250 40240
DISPERSION 5 5
DSI 3 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ025-190800-
VIEQUES-
330 PM AST FRI SEP 18 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 40 30
TEMP (24H TREND) 78 (-3) 90 (0) 78 90
RH % (24H TREND) 86 (+1) 57 (-3) 86 55
WIND 20FT/EARLY(MPH) E 12 E 10 E 11 E 9
WIND 20FT/LATE(MPH) E 12 E 10 E 10 SE 9
MIXING HGT(FT-AGL/MSL) 3110 3360
TRANSPORT WND (MPH) E 10 SE 10
VENT RATE (KT-FT) 27990 30240
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ026-190800-
CULEBRA-
330 PM AST FRI SEP 18 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 30 30
TEMP (24H TREND) 79 (-3) 91 (+2) 79 91
RH % (24H TREND) 87 (+2) 58 (-7) 87 57
WIND 20FT/EARLY(MPH) E 12 E 10 E 11 E 10
WIND 20FT/LATE(MPH) E 12 E 9 E 10 SE 10
MIXING HGT(FT-AGL/MSL) 3170 3280
TRANSPORT WND (MPH) E 13 SE 13
VENT RATE (KT-FT) 34870 36080
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ027-190800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 PM AST FRI SEP 18 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 20 0
TEMP (24H TREND) 75 (-3) 93 (+2) 75 93
RH % (24H TREND) 88 (-1) 56 (0) 93 57
WIND 20FT/EARLY(MPH) E 13 E 13 E 10 E 14
WIND 20FT/LATE(MPH) E 12 SE 16 E 11 SE 16
MIXING HGT(FT-AGL/MSL) 4820 4870
TRANSPORT WND (MPH) E 13 E 14
VENT RATE (KT-FT) 53020 58440
DISPERSION 5 5
DSI 4 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ001-190800-
SAINT THOMAS AND SAINT JOHN-
330 PM AST FRI SEP 18 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 30 30
TEMP (24H TREND) 77 (-4) 88 (0) 77 88
RH % (24H TREND) 89 (+3) 61 (-4) 88 60
WIND 20FT/EARLY(MPH) E 12 E 10 E 11 E 10
WIND 20FT/LATE(MPH) E 12 E 9 E 11 SE 10
MIXING HGT(FT-AGL/MSL) 3060 3270
TRANSPORT WND (MPH) E 10 SE 13
VENT RATE (KT-FT) 27540 35970
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ002-190800-
ST CROIX-
330 PM AST FRI SEP 18 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 20 20
TEMP (24H TREND) 78 (-3) 89 (-1) 78 90
RH % (24H TREND) 89 (+1) 63 (+1) 89 61
WIND 20FT/EARLY(MPH) E 12 E 10 E 10 E 10
WIND 20FT/LATE(MPH) E 11 E 10 E 10 SE 10
MIXING HGT(FT-AGL/MSL) 4380 4760
TRANSPORT WND (MPH) E 12 SE 12
VENT RATE (KT-FT) 43800 47600
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
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